PDFAnalyser.java

/**
 * 
 */
package uk.bl.wa.analyser.payload;

/*
 * #%L
 * warc-indexer
 * %%
 * Copyright (C) 2013 - 2014 The UK Web Archive
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 2 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-2.0.html>.
 * #L%
 */

import java.io.InputStream;
import java.util.HashMap;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tika.metadata.Metadata;
import org.archive.io.ArchiveRecordHeader;

import uk.bl.wa.parsers.ApachePreflightParser;
import uk.bl.wa.solr.SolrFields;
import uk.bl.wa.solr.SolrRecord;

import com.typesafe.config.Config;
import uk.bl.wa.util.Instrument;

/**
 * @author anj
 *
 */
public class PDFAnalyser extends AbstractPayloadAnalyser {
	private static Log log = LogFactory.getLog( PDFAnalyser.class );

	/** */
	private ApachePreflightParser app = new ApachePreflightParser();

	public PDFAnalyser(Config conf) {
	}

	/* (non-Javadoc)
	 * @see uk.bl.wa.analyser.payload.AbstractPayloadAnalyser#analyse(org.archive.io.ArchiveRecordHeader, java.io.InputStream, uk.bl.wa.util.solr.SolrRecord)
	 */
	@Override
	public void analyse(ArchiveRecordHeader header, InputStream tikainput,
			SolrRecord solr) {
        final long start = System.nanoTime();
		Metadata metadata = new Metadata();
		metadata.set(Metadata.RESOURCE_NAME_KEY, header.getUrl());
		ParseRunner parser = new ParseRunner(app, tikainput, metadata, solr);
		Thread thread = new Thread(parser, Long.toString(System
				.currentTimeMillis()));
		try {
			thread.start();
			thread.join(30000L);
			thread.interrupt();
		} catch (Exception e) {
			log.error("WritableSolrRecord.extract(): " + e.getMessage());
			solr.addParseException("when parsing with Apache Preflight", e);
		}

		String isValid = metadata
				.get(ApachePreflightParser.PDF_PREFLIGHT_VALID);
		solr.addField(SolrFields.PDFA_IS_VALID, isValid);
		String[] errors = metadata
				.getValues(ApachePreflightParser.PDF_PREFLIGHT_ERRORS);
		// The same errors can occur multiple times, but in this context that
		// count is not terribly useful. We just want to know which errors are
		// present in which resources.
		if (errors != null) {
			// Add found errors to a Set, counting them up as we go:
			HashMap<String, Integer> uniqueErrors = new HashMap<String, Integer>();
			for (String error : errors) {
				if (uniqueErrors.containsKey(error)) {
					uniqueErrors.put(error, uniqueErrors.get(error) + 1);
				} else {
					uniqueErrors.put(error, 0);

				}
			}
			// Store the Set as the result (the count is ignored at present):
			for (String error : uniqueErrors.keySet()) {
				solr.addField(SolrFields.PDFA_ERRORS, error);
			}
		}
        Instrument.timeRel("WARCPayloadAnalyzers.analyze#total",
                           "PDFAnalyzer.analyze", start);
	}

}